Suppose we obtained data on vein size after applic

Suppose we obtained data on vein size after application of a nitroglycerin ointment in a sample of 50 patients. The mean vein size is found to be 9.7mm with an SD of 2.5. Using a t distribution table, 1. ) what are the confidence limits for a 95% confidence interval? 2.) For a 99% confidence interval?

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